@rachelp, i will definitely retest it. After my injury when the docs allowed me to do intervals i almost did all my “endurance” work with higher intensity training. this is why i believe i developed serious ADS. After reading about in the book.
now im curious how easy is to easy for a let’s say 90-120′ minute runs. sure some of them are recovery style runs. but if im feeling fresh should i run close to 150, or are 10+ beats under it still beneficial. to push my AeT. For real long runs 3-4h+ i think Z1-AeT is fine.
greetings — mirko